title: Effect of impeller flow path on pump performance and impeller stability of the monopivot circulatory pump.
abstract: The effect of a cutout on the pump pressure-flow characteristics and the impeller stability was quantified using computational fluid dynamics analysis in order to provide good hemocompatibility of the monopivot extracorporeal circulation pump. As a result, the following findings were clarified. The pump pressure is lower in the cutout model than in the no-cutout model. The impeller stability with respect to the buoyancy of the impeller is better in the cutout model than in the no-cutout model. The impeller stability with respect to the impeller tilt is better in the cutout model than in the no-cutout model. Therefore, the cutout model, in which the geometry corresponds to the commercialized pump, was likely to be better than the no-cutout model because the stability that has the possibility to decrease the gap instantaneously to increase hemolysis despite the impeller rotational speed slightly.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nishida
authors.forename: Kento
authors.initials: K
authors.lastname: Nakayama
authors.forename: Ryo
authors.initials: R
authors.lastname: Kosaka
authors.forename: Osamu
authors.initials: O
authors.lastname: Maruyama
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Kawaguchi
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kuwana
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamane
mesh_terms: D001775:Blood Circulation / Q000502:physiology*; D001794:Blood Pressure; D006353:Heart-Assist Devices; D018056:Hemorheology; D011474:Prosthesis Design